Three ways to value stocks: which one to choose based on your investment strategy?

When you start trading stocks, you face a dilemma: why does the same value show such different numbers depending on where you look? The nominal value of the stock, the book value, and the market value are not the same thing, and confusing them is one of the most costly mistakes in investing. We teach you how to differentiate and use them properly.

From theory to practice: when to apply each valuation

The market value is the first thing you’ll see on your screen: it’s the price at which you can buy or sell today. But that price doesn’t tell you whether you’re buying expensive or cheap. For that, you need the other two.

The nominal value is just a historical reference: the initial price at which the stock was issued to the market. It will rarely be useful in equity investing, but it’s still important to understand what it represents.

The book value is where the magic happens for value investors. It shows what the company’s accounting says about how much it’s “really worth.” If the market price is below this value, you might be looking at a bargain.

Why you need these three indicators (and not just one)

Imagine comparing two gas company stocks. One trades with a Price/Book ratio of 0.8 and the other at 1.2. Both have good balance sheets, but only by comparing these numbers do you understand which offers a better entry point. If you only looked at the market price, you would have missed the opportunity.

The book value connects you to operational reality: assets minus liabilities, divided by shares outstanding. A company with €7,500,000 in assets, €2,410,000 in liabilities, and 580,000 shares has a book value of €8.77 per share. That represents what it “should be worth” according to its books.

The nominal value, on the other hand, is just the starting point. A company with share capital of €6,500,000 and 500,000 shares issued sets a nominal value of €13. It will rarely match anything in the present.

The market value is what the market decides right now. That decision discounts expectations, news, sentiment, and often irrationality. A market capitalization of €6,940 million divided by 3,020,000 shares results in €2.30 per share. But that price fluctuates because it incorporates hopes, fears, and interest rate changes.

How the market distorts (or reveals) true valuation

The market value is alive and constantly changing. It reacts to monetary policy announcements: if the central bank raises rates, it falls. If it announces credit facilities, it rises. If there’s a relevant sector event, everything moves. It can even irrationally rise during sector euphoria, completely disconnecting from fundamentals.

This is where the book value acts as an anchor. It asks: “Is what the market asks really expensive?” If the P/B is very high, it means you’re paying a lot for each euro of book value. If it’s low, you’ve found potential for revaluation or a trap (maybe the books are misleading due to creative accounting).

The traps of each method: where they fail

The nominal value practically never fails because it doesn’t aim to tell you anything important. Its only utility: remembering the issue price. End of story.

The book value fails when applied to tech or small caps. These companies have huge intangible assets (patents, talent, brand) that accounting underestimates or doesn’t reflect. It also fails if the company plays dirty with “creative accounting”: inflated assets, hidden liabilities.

The market value fails when the market panics or euphoria without reason. It falls baselessly on rumors, rises unjustifiably on hype. The greater risk: you may operate on distorted information.

Quick table for your next investment decision

The art of choosing well: it’s not just a number

Serious investing isn’t just about comparing ratios. The nominal value adds little. The book value is essential if you apply value investing, but it needs context (sector, business models, management quality). The market value is your daily tool, but interpret its movements through fundamental analysis.

Ideally: use the book value to identify potentially undervalued candidates, compare with the market value to measure the discount offered, and then deepen fundamental analysis before clicking buy. The nominal value only helps you understand why all shares of a company have exactly the same mathematical base.

Working with good references is the first step. But the real decision happens when you interpret these three numbers together, according to the context and your strategy.